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Note: The LCD for notebook computers contains many thin-film transistors (TFTs). The presence of a small number of dots that are missing, discolored, or always lit are characteristics of TFT LCD technology, but excessive pixel problems can cause viewing concerns. Click here for information on when the LCD should be replaced for excessive pixel issues.

Symptom or Error

FRU or Action, in sequence

No beep, power-on, indicator on, and a blank LCD during POST

System board

LCD backlight not working

LCD too dark

LCD brightness cannot be adjusted

LCD contrast cannot be adjusted

Lid switch on the keyboard bezel

Reseat the LCD connectors

LCD assembly

System board

LCD screen unreadable

Characters missing pixels

Screen abnormal

Wrong color displayed

See Note above

Reseat all LCD connectors

LCD assembly

System board

LCD screen has extra horizontal or vertical lines displayed

LCD Assembly

LCD screen stays on even after you turn off your computer

Press and hold the power switch for 4 seconds or longer to turn off your computer

Then turn it on again

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